Laurie Martin was named chief investment officer of the $34 billion Connecticut Retirement Plans & Trust Funds, Hartford, spokesman David S. Barrett said in an email.
Ms. Martin replaces Sean Crawford, who left the pension fund after joining as CIO on May 14.
State Treasurer Denise L. Nappier said in an emailed statement: "This is an unfortunate situation. Going forward, I wish Sean the very best in his future plans." Ms. Nappier is also principal fiduciary of the state pension fund.
Ms. Martin, who previously served as the pension fund's deputy CIO, held the CIO role between the February 2017 resignation of Deborah Spalding and Mr. Crawford's arrival.
Mr. Barrett said the deputy CIO position is currently vacant. Mr. Crawford could not be reached regarding his plans.